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1da177e4 LT |
1 | /**************************************************************************/ |
2 | /* */ | |
3 | /* IBM eServer i/pSeries Virtual Ethernet Device Driver */ | |
4 | /* Copyright (C) 2003 IBM Corp. */ | |
5 | /* Originally written by Dave Larson (larson1@us.ibm.com) */ | |
6 | /* Maintained by Santiago Leon (santil@us.ibm.com) */ | |
7 | /* */ | |
8 | /* This program is free software; you can redistribute it and/or modify */ | |
9 | /* it under the terms of the GNU General Public License as published by */ | |
10 | /* the Free Software Foundation; either version 2 of the License, or */ | |
11 | /* (at your option) any later version. */ | |
12 | /* */ | |
13 | /* This program is distributed in the hope that it will be useful, */ | |
14 | /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ | |
15 | /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ | |
16 | /* GNU General Public License for more details. */ | |
17 | /* */ | |
18 | /* You should have received a copy of the GNU General Public License */ | |
19 | /* along with this program; if not, write to the Free Software */ | |
20 | /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */ | |
21 | /* USA */ | |
22 | /* */ | |
23 | /* This module contains the implementation of a virtual ethernet device */ | |
24 | /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */ | |
25 | /* option of the RS/6000 Platform Architechture to interface with virtual */ | |
26 | /* ethernet NICs that are presented to the partition by the hypervisor. */ | |
d7fbeba6 | 27 | /* */ |
1da177e4 LT |
28 | /**************************************************************************/ |
29 | /* | |
30 | TODO: | |
31 | - remove frag processing code - no longer needed | |
32 | - add support for sysfs | |
33 | - possibly remove procfs support | |
34 | */ | |
35 | ||
1da177e4 | 36 | #include <linux/module.h> |
1da177e4 LT |
37 | #include <linux/types.h> |
38 | #include <linux/errno.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/dma-mapping.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/etherdevice.h> | |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/delay.h> | |
47 | #include <linux/mm.h> | |
48 | #include <linux/ethtool.h> | |
49 | #include <linux/proc_fs.h> | |
f4ff2872 BK |
50 | #include <linux/in.h> |
51 | #include <linux/ip.h> | |
457c4cbc | 52 | #include <net/net_namespace.h> |
1da177e4 LT |
53 | #include <asm/semaphore.h> |
54 | #include <asm/hvcall.h> | |
55 | #include <asm/atomic.h> | |
1da177e4 LT |
56 | #include <asm/vio.h> |
57 | #include <asm/uaccess.h> | |
58 | #include <linux/seq_file.h> | |
59 | ||
60 | #include "ibmveth.h" | |
61 | ||
6af37fa9 | 62 | #undef DEBUG |
1da177e4 LT |
63 | |
64 | #define ibmveth_printk(fmt, args...) \ | |
f98baffb | 65 | printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) |
1da177e4 LT |
66 | |
67 | #define ibmveth_error_printk(fmt, args...) \ | |
68 | printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
69 | ||
70 | #ifdef DEBUG | |
71 | #define ibmveth_debug_printk_no_adapter(fmt, args...) \ | |
72 | printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) | |
73 | #define ibmveth_debug_printk(fmt, args...) \ | |
74 | printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
75 | #define ibmveth_assert(expr) \ | |
76 | if(!(expr)) { \ | |
77 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
78 | BUG(); \ | |
79 | } | |
80 | #else | |
81 | #define ibmveth_debug_printk_no_adapter(fmt, args...) | |
82 | #define ibmveth_debug_printk(fmt, args...) | |
d7fbeba6 | 83 | #define ibmveth_assert(expr) |
1da177e4 LT |
84 | #endif |
85 | ||
86 | static int ibmveth_open(struct net_device *dev); | |
87 | static int ibmveth_close(struct net_device *dev); | |
88 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
bea3348e | 89 | static int ibmveth_poll(struct napi_struct *napi, int budget); |
1da177e4 LT |
90 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
91 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev); | |
92 | static void ibmveth_set_multicast_list(struct net_device *dev); | |
93 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
94 | static void ibmveth_proc_register_driver(void); | |
95 | static void ibmveth_proc_unregister_driver(void); | |
96 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
97 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
7d12e780 | 98 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 99 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
860f242e | 100 | static struct kobj_type ktype_veth_pool; |
1da177e4 LT |
101 | |
102 | #ifdef CONFIG_PROC_FS | |
457c4cbc | 103 | #define IBMVETH_PROC_DIR "ibmveth" |
1da177e4 LT |
104 | static struct proc_dir_entry *ibmveth_proc_dir; |
105 | #endif | |
106 | ||
107 | static const char ibmveth_driver_name[] = "ibmveth"; | |
108 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
109 | #define ibmveth_driver_version "1.03" | |
110 | ||
111 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
112 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
113 | MODULE_LICENSE("GPL"); | |
114 | MODULE_VERSION(ibmveth_driver_version); | |
115 | ||
116 | /* simple methods of getting data from the current rxq entry */ | |
117 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) | |
118 | { | |
119 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle); | |
120 | } | |
121 | ||
122 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
123 | { | |
124 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid); | |
125 | } | |
126 | ||
127 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
128 | { | |
129 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset); | |
130 | } | |
131 | ||
132 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
133 | { | |
134 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
135 | } | |
136 | ||
f4ff2872 BK |
137 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
138 | { | |
139 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].csum_good); | |
140 | } | |
141 | ||
1da177e4 | 142 | /* setup the initial settings for a buffer pool */ |
860f242e | 143 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active) |
1da177e4 LT |
144 | { |
145 | pool->size = pool_size; | |
146 | pool->index = pool_index; | |
147 | pool->buff_size = buff_size; | |
148 | pool->threshold = pool_size / 2; | |
860f242e | 149 | pool->active = pool_active; |
1da177e4 LT |
150 | } |
151 | ||
152 | /* allocate and setup an buffer pool - called during open */ | |
153 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
154 | { | |
155 | int i; | |
156 | ||
d7fbeba6 | 157 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
158 | |
159 | if(!pool->free_map) { | |
160 | return -1; | |
161 | } | |
162 | ||
d7fbeba6 | 163 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
164 | if(!pool->dma_addr) { |
165 | kfree(pool->free_map); | |
166 | pool->free_map = NULL; | |
167 | return -1; | |
168 | } | |
169 | ||
170 | pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL); | |
171 | ||
172 | if(!pool->skbuff) { | |
173 | kfree(pool->dma_addr); | |
174 | pool->dma_addr = NULL; | |
175 | ||
176 | kfree(pool->free_map); | |
177 | pool->free_map = NULL; | |
178 | return -1; | |
179 | } | |
180 | ||
181 | memset(pool->skbuff, 0, sizeof(void*) * pool->size); | |
182 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); | |
183 | ||
184 | for(i = 0; i < pool->size; ++i) { | |
185 | pool->free_map[i] = i; | |
186 | } | |
187 | ||
188 | atomic_set(&pool->available, 0); | |
189 | pool->producer_index = 0; | |
190 | pool->consumer_index = 0; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | /* replenish the buffers for a pool. note that we don't need to | |
196 | * skb_reserve these since they are used for incoming... | |
197 | */ | |
198 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
199 | { | |
200 | u32 i; | |
201 | u32 count = pool->size - atomic_read(&pool->available); | |
202 | u32 buffers_added = 0; | |
203 | ||
204 | mb(); | |
205 | ||
206 | for(i = 0; i < count; ++i) { | |
207 | struct sk_buff *skb; | |
208 | unsigned int free_index, index; | |
209 | u64 correlator; | |
210 | union ibmveth_buf_desc desc; | |
211 | unsigned long lpar_rc; | |
212 | dma_addr_t dma_addr; | |
213 | ||
214 | skb = alloc_skb(pool->buff_size, GFP_ATOMIC); | |
215 | ||
216 | if(!skb) { | |
217 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
218 | adapter->replenish_no_mem++; | |
219 | break; | |
220 | } | |
221 | ||
047a66d4 DG |
222 | free_index = pool->consumer_index; |
223 | pool->consumer_index = (pool->consumer_index + 1) % pool->size; | |
1da177e4 | 224 | index = pool->free_map[free_index]; |
d7fbeba6 | 225 | |
1da177e4 LT |
226 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
227 | ibmveth_assert(pool->skbuff[index] == NULL); | |
228 | ||
229 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
230 | pool->buff_size, DMA_FROM_DEVICE); | |
231 | ||
232 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; | |
233 | pool->dma_addr[index] = dma_addr; | |
234 | pool->skbuff[index] = skb; | |
235 | ||
236 | correlator = ((u64)pool->index << 32) | index; | |
237 | *(u64*)skb->data = correlator; | |
238 | ||
239 | desc.desc = 0; | |
240 | desc.fields.valid = 1; | |
241 | desc.fields.length = pool->buff_size; | |
d7fbeba6 | 242 | desc.fields.address = dma_addr; |
1da177e4 LT |
243 | |
244 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 245 | |
706c8c93 | 246 | if(lpar_rc != H_SUCCESS) { |
82702d37 | 247 | pool->free_map[free_index] = index; |
1da177e4 | 248 | pool->skbuff[index] = NULL; |
751ae21c SL |
249 | if (pool->consumer_index == 0) |
250 | pool->consumer_index = pool->size - 1; | |
251 | else | |
252 | pool->consumer_index--; | |
1da177e4 LT |
253 | dma_unmap_single(&adapter->vdev->dev, |
254 | pool->dma_addr[index], pool->buff_size, | |
255 | DMA_FROM_DEVICE); | |
256 | dev_kfree_skb_any(skb); | |
257 | adapter->replenish_add_buff_failure++; | |
258 | break; | |
259 | } else { | |
260 | buffers_added++; | |
261 | adapter->replenish_add_buff_success++; | |
262 | } | |
263 | } | |
d7fbeba6 | 264 | |
1da177e4 LT |
265 | mb(); |
266 | atomic_add(buffers_added, &(pool->available)); | |
267 | } | |
268 | ||
e2adbcb4 | 269 | /* replenish routine */ |
d7fbeba6 | 270 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 271 | { |
b6d35182 SL |
272 | int i; |
273 | ||
1da177e4 LT |
274 | adapter->replenish_task_cycles++; |
275 | ||
b6d35182 SL |
276 | for(i = 0; i < IbmVethNumBufferPools; i++) |
277 | if(adapter->rx_buff_pool[i].active) | |
d7fbeba6 | 278 | ibmveth_replenish_buffer_pool(adapter, |
b6d35182 | 279 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
280 | |
281 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
282 | } |
283 | ||
284 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
285 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
286 | { | |
287 | int i; | |
288 | ||
b4558ea9 JJ |
289 | kfree(pool->free_map); |
290 | pool->free_map = NULL; | |
1da177e4 LT |
291 | |
292 | if(pool->skbuff && pool->dma_addr) { | |
293 | for(i = 0; i < pool->size; ++i) { | |
294 | struct sk_buff *skb = pool->skbuff[i]; | |
295 | if(skb) { | |
296 | dma_unmap_single(&adapter->vdev->dev, | |
297 | pool->dma_addr[i], | |
298 | pool->buff_size, | |
299 | DMA_FROM_DEVICE); | |
300 | dev_kfree_skb_any(skb); | |
301 | pool->skbuff[i] = NULL; | |
302 | } | |
303 | } | |
304 | } | |
305 | ||
306 | if(pool->dma_addr) { | |
307 | kfree(pool->dma_addr); | |
308 | pool->dma_addr = NULL; | |
309 | } | |
310 | ||
311 | if(pool->skbuff) { | |
312 | kfree(pool->skbuff); | |
313 | pool->skbuff = NULL; | |
314 | } | |
315 | } | |
316 | ||
317 | /* remove a buffer from a pool */ | |
318 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
319 | { | |
320 | unsigned int pool = correlator >> 32; | |
321 | unsigned int index = correlator & 0xffffffffUL; | |
322 | unsigned int free_index; | |
323 | struct sk_buff *skb; | |
324 | ||
325 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
326 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
327 | ||
328 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
329 | ||
330 | ibmveth_assert(skb != NULL); | |
331 | ||
332 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
333 | ||
334 | dma_unmap_single(&adapter->vdev->dev, | |
335 | adapter->rx_buff_pool[pool].dma_addr[index], | |
336 | adapter->rx_buff_pool[pool].buff_size, | |
337 | DMA_FROM_DEVICE); | |
338 | ||
047a66d4 DG |
339 | free_index = adapter->rx_buff_pool[pool].producer_index; |
340 | adapter->rx_buff_pool[pool].producer_index | |
341 | = (adapter->rx_buff_pool[pool].producer_index + 1) | |
342 | % adapter->rx_buff_pool[pool].size; | |
1da177e4 LT |
343 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
344 | ||
345 | mb(); | |
346 | ||
347 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
348 | } | |
349 | ||
350 | /* get the current buffer on the rx queue */ | |
351 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
352 | { | |
353 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
354 | unsigned int pool = correlator >> 32; | |
355 | unsigned int index = correlator & 0xffffffffUL; | |
356 | ||
357 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
358 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
359 | ||
360 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
361 | } | |
362 | ||
363 | /* recycle the current buffer on the rx queue */ | |
364 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
365 | { | |
366 | u32 q_index = adapter->rx_queue.index; | |
367 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
368 | unsigned int pool = correlator >> 32; | |
369 | unsigned int index = correlator & 0xffffffffUL; | |
370 | union ibmveth_buf_desc desc; | |
371 | unsigned long lpar_rc; | |
372 | ||
373 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
374 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
375 | ||
b6d35182 SL |
376 | if(!adapter->rx_buff_pool[pool].active) { |
377 | ibmveth_rxq_harvest_buffer(adapter); | |
378 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
379 | return; | |
380 | } | |
381 | ||
1da177e4 LT |
382 | desc.desc = 0; |
383 | desc.fields.valid = 1; | |
384 | desc.fields.length = adapter->rx_buff_pool[pool].buff_size; | |
385 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; | |
386 | ||
387 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 388 | |
706c8c93 | 389 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
390 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
391 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
392 | } | |
393 | ||
394 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
395 | adapter->rx_queue.index = 0; | |
396 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
397 | } | |
398 | } | |
399 | ||
493a684a | 400 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
401 | { |
402 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
403 | ||
404 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
405 | adapter->rx_queue.index = 0; | |
406 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
407 | } | |
408 | } | |
409 | ||
410 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
411 | { | |
b6d35182 SL |
412 | int i; |
413 | ||
1da177e4 LT |
414 | if(adapter->buffer_list_addr != NULL) { |
415 | if(!dma_mapping_error(adapter->buffer_list_dma)) { | |
416 | dma_unmap_single(&adapter->vdev->dev, | |
417 | adapter->buffer_list_dma, 4096, | |
418 | DMA_BIDIRECTIONAL); | |
419 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
420 | } | |
421 | free_page((unsigned long)adapter->buffer_list_addr); | |
422 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 423 | } |
1da177e4 LT |
424 | |
425 | if(adapter->filter_list_addr != NULL) { | |
426 | if(!dma_mapping_error(adapter->filter_list_dma)) { | |
427 | dma_unmap_single(&adapter->vdev->dev, | |
428 | adapter->filter_list_dma, 4096, | |
429 | DMA_BIDIRECTIONAL); | |
430 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
431 | } | |
432 | free_page((unsigned long)adapter->filter_list_addr); | |
433 | adapter->filter_list_addr = NULL; | |
434 | } | |
435 | ||
436 | if(adapter->rx_queue.queue_addr != NULL) { | |
437 | if(!dma_mapping_error(adapter->rx_queue.queue_dma)) { | |
438 | dma_unmap_single(&adapter->vdev->dev, | |
439 | adapter->rx_queue.queue_dma, | |
440 | adapter->rx_queue.queue_len, | |
441 | DMA_BIDIRECTIONAL); | |
442 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
443 | } | |
444 | kfree(adapter->rx_queue.queue_addr); | |
445 | adapter->rx_queue.queue_addr = NULL; | |
446 | } | |
447 | ||
b6d35182 | 448 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 449 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 450 | ibmveth_free_buffer_pool(adapter, |
860f242e | 451 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
452 | } |
453 | ||
bbedefcc ME |
454 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
455 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
456 | { | |
457 | int rc, try_again = 1; | |
458 | ||
459 | /* After a kexec the adapter will still be open, so our attempt to | |
460 | * open it will fail. So if we get a failure we free the adapter and | |
461 | * try again, but only once. */ | |
462 | retry: | |
463 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
464 | adapter->buffer_list_dma, rxq_desc.desc, | |
465 | adapter->filter_list_dma, mac_address); | |
466 | ||
467 | if (rc != H_SUCCESS && try_again) { | |
468 | do { | |
469 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
470 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
471 | ||
472 | try_again = 0; | |
473 | goto retry; | |
474 | } | |
475 | ||
476 | return rc; | |
477 | } | |
478 | ||
1da177e4 LT |
479 | static int ibmveth_open(struct net_device *netdev) |
480 | { | |
481 | struct ibmveth_adapter *adapter = netdev->priv; | |
482 | u64 mac_address = 0; | |
b6d35182 | 483 | int rxq_entries = 1; |
1da177e4 LT |
484 | unsigned long lpar_rc; |
485 | int rc; | |
486 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 487 | int i; |
1da177e4 LT |
488 | |
489 | ibmveth_debug_printk("open starting\n"); | |
490 | ||
bea3348e SH |
491 | napi_enable(&adapter->napi); |
492 | ||
b6d35182 SL |
493 | for(i = 0; i<IbmVethNumBufferPools; i++) |
494 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 495 | |
1da177e4 LT |
496 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
497 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 498 | |
1da177e4 LT |
499 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
500 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
501 | ibmveth_cleanup(adapter); | |
bea3348e | 502 | napi_disable(&adapter->napi); |
1da177e4 LT |
503 | return -ENOMEM; |
504 | } | |
505 | ||
506 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
507 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
508 | ||
509 | if(!adapter->rx_queue.queue_addr) { | |
510 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
511 | ibmveth_cleanup(adapter); | |
bea3348e | 512 | napi_disable(&adapter->napi); |
1da177e4 LT |
513 | return -ENOMEM; |
514 | } | |
515 | ||
516 | adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev, | |
517 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); | |
518 | adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev, | |
519 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); | |
520 | adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev, | |
521 | adapter->rx_queue.queue_addr, | |
522 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
523 | ||
524 | if((dma_mapping_error(adapter->buffer_list_dma) ) || | |
525 | (dma_mapping_error(adapter->filter_list_dma)) || | |
526 | (dma_mapping_error(adapter->rx_queue.queue_dma))) { | |
527 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); | |
528 | ibmveth_cleanup(adapter); | |
bea3348e | 529 | napi_disable(&adapter->napi); |
1da177e4 LT |
530 | return -ENOMEM; |
531 | } | |
532 | ||
533 | adapter->rx_queue.index = 0; | |
534 | adapter->rx_queue.num_slots = rxq_entries; | |
535 | adapter->rx_queue.toggle = 1; | |
536 | ||
1da177e4 LT |
537 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
538 | mac_address = mac_address >> 16; | |
539 | ||
540 | rxq_desc.desc = 0; | |
541 | rxq_desc.fields.valid = 1; | |
542 | rxq_desc.fields.length = adapter->rx_queue.queue_len; | |
543 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; | |
544 | ||
545 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
546 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
547 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
548 | ||
4347ef15 SL |
549 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
550 | ||
bbedefcc | 551 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 552 | |
706c8c93 | 553 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 554 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
8168f902 | 555 | ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n", |
1da177e4 LT |
556 | adapter->buffer_list_dma, |
557 | adapter->filter_list_dma, | |
558 | rxq_desc.desc, | |
559 | mac_address); | |
560 | ibmveth_cleanup(adapter); | |
bea3348e | 561 | napi_disable(&adapter->napi); |
d7fbeba6 | 562 | return -ENONET; |
1da177e4 LT |
563 | } |
564 | ||
860f242e SL |
565 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
566 | if(!adapter->rx_buff_pool[i].active) | |
567 | continue; | |
568 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
569 | ibmveth_error_printk("unable to alloc pool\n"); | |
570 | adapter->rx_buff_pool[i].active = 0; | |
571 | ibmveth_cleanup(adapter); | |
bea3348e | 572 | napi_disable(&adapter->napi); |
860f242e SL |
573 | return -ENOMEM ; |
574 | } | |
575 | } | |
576 | ||
1da177e4 LT |
577 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
578 | if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { | |
579 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); | |
580 | do { | |
581 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 582 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
583 | |
584 | ibmveth_cleanup(adapter); | |
bea3348e | 585 | napi_disable(&adapter->napi); |
1da177e4 LT |
586 | return rc; |
587 | } | |
588 | ||
e2adbcb4 | 589 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 590 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 591 | |
e2adbcb4 | 592 | netif_start_queue(netdev); |
1da177e4 LT |
593 | |
594 | ibmveth_debug_printk("open complete\n"); | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | static int ibmveth_close(struct net_device *netdev) | |
600 | { | |
601 | struct ibmveth_adapter *adapter = netdev->priv; | |
602 | long lpar_rc; | |
d7fbeba6 | 603 | |
1da177e4 LT |
604 | ibmveth_debug_printk("close starting\n"); |
605 | ||
bea3348e SH |
606 | napi_disable(&adapter->napi); |
607 | ||
860f242e SL |
608 | if (!adapter->pool_config) |
609 | netif_stop_queue(netdev); | |
1da177e4 LT |
610 | |
611 | free_irq(netdev->irq, netdev); | |
612 | ||
1da177e4 LT |
613 | do { |
614 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 615 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 616 | |
706c8c93 | 617 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
618 | { |
619 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
620 | lpar_rc); | |
621 | } | |
622 | ||
623 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
624 | ||
625 | ibmveth_cleanup(adapter); | |
626 | ||
627 | ibmveth_debug_printk("close complete\n"); | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
633 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
634 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
635 | cmd->speed = SPEED_1000; | |
636 | cmd->duplex = DUPLEX_FULL; | |
637 | cmd->port = PORT_FIBRE; | |
638 | cmd->phy_address = 0; | |
639 | cmd->transceiver = XCVR_INTERNAL; | |
640 | cmd->autoneg = AUTONEG_ENABLE; | |
641 | cmd->maxtxpkt = 0; | |
642 | cmd->maxrxpkt = 1; | |
643 | return 0; | |
644 | } | |
645 | ||
646 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
647 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
648 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
649 | } | |
650 | ||
651 | static u32 netdev_get_link(struct net_device *dev) { | |
652 | return 1; | |
653 | } | |
654 | ||
5fc7e01c BK |
655 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
656 | { | |
657 | struct ibmveth_adapter *adapter = dev->priv; | |
658 | ||
659 | if (data) | |
660 | adapter->rx_csum = 1; | |
661 | else { | |
662 | /* | |
663 | * Since the ibmveth firmware interface does not have the concept of | |
664 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
665 | * we also have to disable tx checksum offload. Once we disable rx | |
666 | * checksum offload, we are no longer allowed to send tx buffers that | |
667 | * are not properly checksummed. | |
668 | */ | |
669 | adapter->rx_csum = 0; | |
670 | dev->features &= ~NETIF_F_IP_CSUM; | |
671 | } | |
672 | } | |
673 | ||
674 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
675 | { | |
676 | struct ibmveth_adapter *adapter = dev->priv; | |
677 | ||
678 | if (data) { | |
679 | dev->features |= NETIF_F_IP_CSUM; | |
680 | adapter->rx_csum = 1; | |
681 | } else | |
682 | dev->features &= ~NETIF_F_IP_CSUM; | |
683 | } | |
684 | ||
685 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
686 | void (*done) (struct net_device *, u32)) | |
687 | { | |
688 | struct ibmveth_adapter *adapter = dev->priv; | |
689 | union ibmveth_illan_attributes set_attr, clr_attr, ret_attr; | |
690 | long ret; | |
691 | int rc1 = 0, rc2 = 0; | |
692 | int restart = 0; | |
693 | ||
694 | if (netif_running(dev)) { | |
695 | restart = 1; | |
696 | adapter->pool_config = 1; | |
697 | ibmveth_close(dev); | |
698 | adapter->pool_config = 0; | |
699 | } | |
700 | ||
701 | set_attr.desc = 0; | |
702 | clr_attr.desc = 0; | |
703 | ||
704 | if (data) | |
705 | set_attr.fields.tcp_csum_offload_ipv4 = 1; | |
706 | else | |
707 | clr_attr.fields.tcp_csum_offload_ipv4 = 1; | |
708 | ||
709 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr.desc); | |
710 | ||
711 | if (ret == H_SUCCESS && !ret_attr.fields.active_trunk && | |
712 | !ret_attr.fields.trunk_priority && | |
713 | ret_attr.fields.csum_offload_padded_pkt_support) { | |
714 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr.desc, | |
715 | set_attr.desc, &ret_attr.desc); | |
716 | ||
717 | if (ret != H_SUCCESS) { | |
718 | rc1 = -EIO; | |
719 | ibmveth_error_printk("unable to change checksum offload settings." | |
720 | " %d rc=%ld\n", data, ret); | |
721 | ||
722 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
723 | set_attr.desc, clr_attr.desc, &ret_attr.desc); | |
724 | } else | |
725 | done(dev, data); | |
726 | } else { | |
727 | rc1 = -EIO; | |
728 | ibmveth_error_printk("unable to change checksum offload settings." | |
729 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr.desc); | |
730 | } | |
731 | ||
732 | if (restart) | |
733 | rc2 = ibmveth_open(dev); | |
734 | ||
735 | return rc1 ? rc1 : rc2; | |
736 | } | |
737 | ||
738 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
739 | { | |
740 | struct ibmveth_adapter *adapter = dev->priv; | |
741 | ||
742 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
743 | return 0; | |
744 | ||
745 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
746 | } | |
747 | ||
748 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
749 | { | |
750 | struct ibmveth_adapter *adapter = dev->priv; | |
751 | int rc = 0; | |
752 | ||
753 | if (data && (dev->features & NETIF_F_IP_CSUM)) | |
754 | return 0; | |
755 | if (!data && !(dev->features & NETIF_F_IP_CSUM)) | |
756 | return 0; | |
757 | ||
758 | if (data && !adapter->rx_csum) | |
759 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
760 | else | |
761 | ibmveth_set_tx_csum_flags(dev, data); | |
762 | ||
763 | return rc; | |
764 | } | |
765 | ||
766 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
767 | { | |
768 | struct ibmveth_adapter *adapter = dev->priv; | |
769 | return adapter->rx_csum; | |
770 | } | |
771 | ||
7282d491 | 772 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
773 | .get_drvinfo = netdev_get_drvinfo, |
774 | .get_settings = netdev_get_settings, | |
775 | .get_link = netdev_get_link, | |
776 | .get_sg = ethtool_op_get_sg, | |
777 | .get_tx_csum = ethtool_op_get_tx_csum, | |
5fc7e01c BK |
778 | .set_tx_csum = ibmveth_set_tx_csum, |
779 | .get_rx_csum = ibmveth_get_rx_csum, | |
780 | .set_rx_csum = ibmveth_set_rx_csum, | |
80e53677 BK |
781 | .get_tso = ethtool_op_get_tso, |
782 | .get_ufo = ethtool_op_get_ufo, | |
1da177e4 LT |
783 | }; |
784 | ||
785 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
786 | { | |
787 | return -EOPNOTSUPP; | |
788 | } | |
789 | ||
790 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
791 | ||
792 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
793 | { | |
794 | struct ibmveth_adapter *adapter = netdev->priv; | |
795 | union ibmveth_buf_desc desc[IbmVethMaxSendFrags]; | |
796 | unsigned long lpar_rc; | |
797 | int nfrags = 0, curfrag; | |
798 | unsigned long correlator; | |
60296d9e | 799 | unsigned long flags; |
1da177e4 | 800 | unsigned int retry_count; |
60296d9e SL |
801 | unsigned int tx_dropped = 0; |
802 | unsigned int tx_bytes = 0; | |
803 | unsigned int tx_packets = 0; | |
804 | unsigned int tx_send_failed = 0; | |
805 | unsigned int tx_map_failed = 0; | |
806 | ||
1da177e4 LT |
807 | |
808 | if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) { | |
60296d9e SL |
809 | tx_dropped++; |
810 | goto out; | |
1da177e4 LT |
811 | } |
812 | ||
813 | memset(&desc, 0, sizeof(desc)); | |
814 | ||
815 | /* nfrags = number of frags after the initial fragment */ | |
816 | nfrags = skb_shinfo(skb)->nr_frags; | |
817 | ||
818 | if(nfrags) | |
819 | adapter->tx_multidesc_send++; | |
820 | ||
821 | /* map the initial fragment */ | |
822 | desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len; | |
823 | desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
824 | desc[0].fields.length, DMA_TO_DEVICE); | |
825 | desc[0].fields.valid = 1; | |
826 | ||
f4ff2872 BK |
827 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
828 | ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { | |
829 | ibmveth_error_printk("tx: failed to checksum packet\n"); | |
830 | tx_dropped++; | |
831 | goto out; | |
832 | } | |
833 | ||
834 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
835 | unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; | |
836 | ||
837 | desc[0].fields.no_csum = 1; | |
838 | desc[0].fields.csum_good = 1; | |
839 | ||
840 | /* Need to zero out the checksum */ | |
841 | buf[0] = 0; | |
842 | buf[1] = 0; | |
843 | } | |
844 | ||
1da177e4 LT |
845 | if(dma_mapping_error(desc[0].fields.address)) { |
846 | ibmveth_error_printk("tx: unable to map initial fragment\n"); | |
60296d9e SL |
847 | tx_map_failed++; |
848 | tx_dropped++; | |
849 | goto out; | |
1da177e4 LT |
850 | } |
851 | ||
852 | curfrag = nfrags; | |
853 | ||
854 | /* map fragments past the initial portion if there are any */ | |
855 | while(curfrag--) { | |
856 | skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag]; | |
857 | desc[curfrag+1].fields.address | |
858 | = dma_map_single(&adapter->vdev->dev, | |
859 | page_address(frag->page) + frag->page_offset, | |
860 | frag->size, DMA_TO_DEVICE); | |
861 | desc[curfrag+1].fields.length = frag->size; | |
862 | desc[curfrag+1].fields.valid = 1; | |
f4ff2872 BK |
863 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
864 | desc[curfrag+1].fields.no_csum = 1; | |
865 | desc[curfrag+1].fields.csum_good = 1; | |
866 | } | |
1da177e4 LT |
867 | |
868 | if(dma_mapping_error(desc[curfrag+1].fields.address)) { | |
869 | ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag); | |
60296d9e SL |
870 | tx_map_failed++; |
871 | tx_dropped++; | |
1da177e4 LT |
872 | /* Free all the mappings we just created */ |
873 | while(curfrag < nfrags) { | |
874 | dma_unmap_single(&adapter->vdev->dev, | |
875 | desc[curfrag+1].fields.address, | |
876 | desc[curfrag+1].fields.length, | |
877 | DMA_TO_DEVICE); | |
878 | curfrag++; | |
879 | } | |
60296d9e | 880 | goto out; |
1da177e4 LT |
881 | } |
882 | } | |
883 | ||
884 | /* send the frame. Arbitrarily set retrycount to 1024 */ | |
885 | correlator = 0; | |
886 | retry_count = 1024; | |
887 | do { | |
888 | lpar_rc = h_send_logical_lan(adapter->vdev->unit_address, | |
889 | desc[0].desc, | |
890 | desc[1].desc, | |
891 | desc[2].desc, | |
892 | desc[3].desc, | |
893 | desc[4].desc, | |
894 | desc[5].desc, | |
b9377ffc AB |
895 | correlator, |
896 | &correlator); | |
706c8c93 | 897 | } while ((lpar_rc == H_BUSY) && (retry_count--)); |
d7fbeba6 | 898 | |
706c8c93 | 899 | if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) { |
1da177e4 LT |
900 | int i; |
901 | ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); | |
902 | for(i = 0; i < 6; i++) { | |
903 | ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i, | |
904 | desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address); | |
905 | } | |
60296d9e SL |
906 | tx_send_failed++; |
907 | tx_dropped++; | |
1da177e4 | 908 | } else { |
60296d9e SL |
909 | tx_packets++; |
910 | tx_bytes += skb->len; | |
0abe791e | 911 | netdev->trans_start = jiffies; |
1da177e4 LT |
912 | } |
913 | ||
914 | do { | |
915 | dma_unmap_single(&adapter->vdev->dev, | |
916 | desc[nfrags].fields.address, | |
917 | desc[nfrags].fields.length, DMA_TO_DEVICE); | |
918 | } while(--nfrags >= 0); | |
919 | ||
60296d9e SL |
920 | out: spin_lock_irqsave(&adapter->stats_lock, flags); |
921 | adapter->stats.tx_dropped += tx_dropped; | |
922 | adapter->stats.tx_bytes += tx_bytes; | |
923 | adapter->stats.tx_packets += tx_packets; | |
924 | adapter->tx_send_failed += tx_send_failed; | |
925 | adapter->tx_map_failed += tx_map_failed; | |
926 | spin_unlock_irqrestore(&adapter->stats_lock, flags); | |
927 | ||
1da177e4 LT |
928 | dev_kfree_skb(skb); |
929 | return 0; | |
930 | } | |
931 | ||
bea3348e | 932 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 933 | { |
bea3348e SH |
934 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
935 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 936 | int frames_processed = 0; |
1da177e4 LT |
937 | unsigned long lpar_rc; |
938 | ||
939 | restart_poll: | |
940 | do { | |
bea3348e | 941 | struct sk_buff *skb; |
1da177e4 | 942 | |
bea3348e SH |
943 | if (!ibmveth_rxq_pending_buffer(adapter)) |
944 | break; | |
1da177e4 | 945 | |
bea3348e SH |
946 | rmb(); |
947 | if (!ibmveth_rxq_buffer_valid(adapter)) { | |
948 | wmb(); /* suggested by larson1 */ | |
949 | adapter->rx_invalid_buffer++; | |
950 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
951 | ibmveth_rxq_recycle_buffer(adapter); | |
952 | } else { | |
953 | int length = ibmveth_rxq_frame_length(adapter); | |
954 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
955 | int csum_good = ibmveth_rxq_csum_good(adapter); |
956 | ||
bea3348e | 957 | skb = ibmveth_rxq_get_buffer(adapter); |
f4ff2872 BK |
958 | if (csum_good) |
959 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1da177e4 | 960 | |
bea3348e | 961 | ibmveth_rxq_harvest_buffer(adapter); |
1da177e4 | 962 | |
bea3348e SH |
963 | skb_reserve(skb, offset); |
964 | skb_put(skb, length); | |
965 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 966 | |
bea3348e | 967 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 968 | |
bea3348e SH |
969 | adapter->stats.rx_packets++; |
970 | adapter->stats.rx_bytes += length; | |
971 | frames_processed++; | |
972 | netdev->last_rx = jiffies; | |
1da177e4 | 973 | } |
bea3348e | 974 | } while (frames_processed < budget); |
1da177e4 | 975 | |
e2adbcb4 | 976 | ibmveth_replenish_task(adapter); |
1da177e4 | 977 | |
bea3348e SH |
978 | if (frames_processed < budget) { |
979 | /* We think we are done - reenable interrupts, | |
980 | * then check once more to make sure we are done. | |
981 | */ | |
982 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
983 | VIO_IRQ_ENABLE); | |
1da177e4 | 984 | |
bea3348e | 985 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 986 | |
bea3348e | 987 | netif_rx_complete(netdev, napi); |
1da177e4 | 988 | |
bea3348e SH |
989 | if (ibmveth_rxq_pending_buffer(adapter) && |
990 | netif_rx_reschedule(netdev, napi)) { | |
991 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
992 | VIO_IRQ_DISABLE); | |
993 | goto restart_poll; | |
994 | } | |
1da177e4 LT |
995 | } |
996 | ||
bea3348e | 997 | return frames_processed; |
1da177e4 LT |
998 | } |
999 | ||
7d12e780 | 1000 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1001 | { |
1da177e4 LT |
1002 | struct net_device *netdev = dev_instance; |
1003 | struct ibmveth_adapter *adapter = netdev->priv; | |
1004 | unsigned long lpar_rc; | |
1005 | ||
bea3348e SH |
1006 | if (netif_rx_schedule_prep(netdev, &adapter->napi)) { |
1007 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1008 | VIO_IRQ_DISABLE); | |
706c8c93 | 1009 | ibmveth_assert(lpar_rc == H_SUCCESS); |
bea3348e | 1010 | __netif_rx_schedule(netdev, &adapter->napi); |
1da177e4 LT |
1011 | } |
1012 | return IRQ_HANDLED; | |
1013 | } | |
1014 | ||
1015 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev) | |
1016 | { | |
1017 | struct ibmveth_adapter *adapter = dev->priv; | |
1018 | return &adapter->stats; | |
1019 | } | |
1020 | ||
1021 | static void ibmveth_set_multicast_list(struct net_device *netdev) | |
1022 | { | |
1023 | struct ibmveth_adapter *adapter = netdev->priv; | |
1024 | unsigned long lpar_rc; | |
1025 | ||
1026 | if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) { | |
1027 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1028 | IbmVethMcastEnableRecv | | |
1029 | IbmVethMcastDisableFiltering, | |
1030 | 0); | |
706c8c93 | 1031 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1032 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1033 | } | |
1034 | } else { | |
1035 | struct dev_mc_list *mclist = netdev->mc_list; | |
1036 | int i; | |
1037 | /* clear the filter table & disable filtering */ | |
1038 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1039 | IbmVethMcastEnableRecv | | |
1040 | IbmVethMcastDisableFiltering | | |
1041 | IbmVethMcastClearFilterTable, | |
1042 | 0); | |
706c8c93 | 1043 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1044 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1045 | } | |
1046 | /* add the addresses to the filter table */ | |
1047 | for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) { | |
1048 | // add the multicast address to the filter table | |
1049 | unsigned long mcast_addr = 0; | |
1050 | memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6); | |
1051 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1052 | IbmVethMcastAddFilter, | |
1053 | mcast_addr); | |
706c8c93 | 1054 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1055 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1056 | } | |
1057 | } | |
d7fbeba6 | 1058 | |
1da177e4 LT |
1059 | /* re-enable filtering */ |
1060 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1061 | IbmVethMcastEnableFiltering, | |
1062 | 0); | |
706c8c93 | 1063 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1064 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1070 | { | |
b6d35182 | 1071 | struct ibmveth_adapter *adapter = dev->priv; |
860f242e | 1072 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
ce6eea58 BK |
1073 | int reinit = 0; |
1074 | int i, rc; | |
b6d35182 | 1075 | |
860f242e | 1076 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1077 | return -EINVAL; |
b6d35182 | 1078 | |
ce6eea58 BK |
1079 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1080 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1081 | break; | |
1082 | ||
1083 | if (i == IbmVethNumBufferPools) | |
1084 | return -EINVAL; | |
1085 | ||
860f242e | 1086 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1087 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ce6eea58 BK |
1088 | if (!adapter->rx_buff_pool[i].active) { |
1089 | adapter->rx_buff_pool[i].active = 1; | |
1090 | reinit = 1; | |
1091 | } | |
1092 | ||
860f242e | 1093 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
ce6eea58 BK |
1094 | if (reinit && netif_running(adapter->netdev)) { |
1095 | adapter->pool_config = 1; | |
1096 | ibmveth_close(adapter->netdev); | |
1097 | adapter->pool_config = 0; | |
1098 | dev->mtu = new_mtu; | |
1099 | if ((rc = ibmveth_open(adapter->netdev))) | |
1100 | return rc; | |
1101 | } else | |
1102 | dev->mtu = new_mtu; | |
860f242e | 1103 | return 0; |
b6d35182 | 1104 | } |
b6d35182 | 1105 | } |
860f242e | 1106 | return -EINVAL; |
1da177e4 LT |
1107 | } |
1108 | ||
6b422374 SL |
1109 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1110 | static void ibmveth_poll_controller(struct net_device *dev) | |
1111 | { | |
1112 | ibmveth_replenish_task(dev->priv); | |
5f77113c | 1113 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1114 | } |
1115 | #endif | |
1116 | ||
1da177e4 LT |
1117 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1118 | { | |
b6d35182 | 1119 | int rc, i; |
f4ff2872 | 1120 | long ret; |
1da177e4 | 1121 | struct net_device *netdev; |
9dc83afd | 1122 | struct ibmveth_adapter *adapter; |
f4ff2872 | 1123 | union ibmveth_illan_attributes set_attr, ret_attr; |
1da177e4 LT |
1124 | |
1125 | unsigned char *mac_addr_p; | |
1126 | unsigned int *mcastFilterSize_p; | |
1127 | ||
1128 | ||
d7fbeba6 | 1129 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1130 | dev->unit_address); |
1131 | ||
493a684a ME |
1132 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1133 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1134 | if(!mac_addr_p) { |
1135 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1136 | "attribute\n", __FILE__, __LINE__); | |
1137 | return 0; | |
1138 | } | |
d7fbeba6 | 1139 | |
493a684a ME |
1140 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1141 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1142 | if(!mcastFilterSize_p) { |
1143 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1144 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1145 | __FILE__, __LINE__); | |
1146 | return 0; | |
1147 | } | |
d7fbeba6 | 1148 | |
1da177e4 LT |
1149 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1150 | ||
1151 | if(!netdev) | |
1152 | return -ENOMEM; | |
1153 | ||
1154 | SET_MODULE_OWNER(netdev); | |
1155 | ||
1156 | adapter = netdev->priv; | |
1da177e4 LT |
1157 | dev->dev.driver_data = netdev; |
1158 | ||
1159 | adapter->vdev = dev; | |
1160 | adapter->netdev = netdev; | |
1161 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1162 | adapter->pool_config = 0; |
d7fbeba6 | 1163 | |
bea3348e SH |
1164 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1165 | ||
1da177e4 | 1166 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1167 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1168 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1169 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1170 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1171 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1172 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1173 | ||
1174 | if ((*mac_addr_p & 0x3) != 0x02) | |
1175 | mac_addr_p += 2; | |
1176 | ||
1177 | adapter->mac_addr = 0; | |
1178 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1179 | ||
1da177e4 LT |
1180 | netdev->irq = dev->irq; |
1181 | netdev->open = ibmveth_open; | |
1da177e4 LT |
1182 | netdev->stop = ibmveth_close; |
1183 | netdev->hard_start_xmit = ibmveth_start_xmit; | |
1184 | netdev->get_stats = ibmveth_get_stats; | |
1185 | netdev->set_multicast_list = ibmveth_set_multicast_list; | |
1186 | netdev->do_ioctl = ibmveth_ioctl; | |
1187 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1188 | netdev->change_mtu = ibmveth_change_mtu; | |
1189 | SET_NETDEV_DEV(netdev, &dev->dev); | |
6b422374 SL |
1190 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1191 | netdev->poll_controller = ibmveth_poll_controller; | |
1192 | #endif | |
d7fbeba6 | 1193 | netdev->features |= NETIF_F_LLTX; |
60296d9e | 1194 | spin_lock_init(&adapter->stats_lock); |
1da177e4 LT |
1195 | |
1196 | memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); | |
1197 | ||
860f242e SL |
1198 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1199 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
d7fbeba6 JG |
1200 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1201 | pool_count[i], pool_size[i], | |
860f242e SL |
1202 | pool_active[i]); |
1203 | kobj->parent = &dev->dev.kobj; | |
1204 | sprintf(kobj->name, "pool%d", i); | |
1205 | kobj->ktype = &ktype_veth_pool; | |
1206 | kobject_register(kobj); | |
1207 | } | |
1da177e4 LT |
1208 | |
1209 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1210 | ||
1da177e4 LT |
1211 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1212 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1213 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1214 | ||
1da177e4 LT |
1215 | ibmveth_debug_printk("registering netdev...\n"); |
1216 | ||
f4ff2872 BK |
1217 | ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc); |
1218 | ||
1219 | if (ret == H_SUCCESS && !ret_attr.fields.active_trunk && | |
1220 | !ret_attr.fields.trunk_priority && | |
1221 | ret_attr.fields.csum_offload_padded_pkt_support) { | |
1222 | set_attr.desc = 0; | |
1223 | set_attr.fields.tcp_csum_offload_ipv4 = 1; | |
1224 | ||
1225 | ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc, | |
1226 | &ret_attr.desc); | |
1227 | ||
5fc7e01c BK |
1228 | if (ret == H_SUCCESS) { |
1229 | adapter->rx_csum = 1; | |
f4ff2872 | 1230 | netdev->features |= NETIF_F_IP_CSUM; |
5fc7e01c | 1231 | } else |
f4ff2872 BK |
1232 | ret = h_illan_attributes(dev->unit_address, set_attr.desc, |
1233 | 0, &ret_attr.desc); | |
1234 | } | |
1235 | ||
1da177e4 LT |
1236 | rc = register_netdev(netdev); |
1237 | ||
1238 | if(rc) { | |
1239 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1240 | free_netdev(netdev); | |
1241 | return rc; | |
1242 | } | |
1243 | ||
1244 | ibmveth_debug_printk("registered\n"); | |
1245 | ||
1246 | ibmveth_proc_register_adapter(adapter); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1252 | { | |
1253 | struct net_device *netdev = dev->dev.driver_data; | |
1254 | struct ibmveth_adapter *adapter = netdev->priv; | |
860f242e SL |
1255 | int i; |
1256 | ||
1257 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
1258 | kobject_unregister(&adapter->rx_buff_pool[i].kobj); | |
1da177e4 LT |
1259 | |
1260 | unregister_netdev(netdev); | |
1261 | ||
1262 | ibmveth_proc_unregister_adapter(adapter); | |
1263 | ||
1264 | free_netdev(netdev); | |
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | #ifdef CONFIG_PROC_FS | |
1269 | static void ibmveth_proc_register_driver(void) | |
1270 | { | |
457c4cbc | 1271 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1272 | if (ibmveth_proc_dir) { |
1273 | SET_MODULE_OWNER(ibmveth_proc_dir); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | static void ibmveth_proc_unregister_driver(void) | |
1278 | { | |
457c4cbc | 1279 | remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1280 | } |
1281 | ||
d7fbeba6 | 1282 | static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4 LT |
1283 | { |
1284 | if (*pos == 0) { | |
1285 | return (void *)1; | |
1286 | } else { | |
1287 | return NULL; | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1292 | { | |
1293 | ++*pos; | |
1294 | return NULL; | |
1295 | } | |
1296 | ||
d7fbeba6 | 1297 | static void ibmveth_seq_stop(struct seq_file *seq, void *v) |
1da177e4 LT |
1298 | { |
1299 | } | |
1300 | ||
d7fbeba6 | 1301 | static int ibmveth_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1302 | { |
1303 | struct ibmveth_adapter *adapter = seq->private; | |
1304 | char *current_mac = ((char*) &adapter->netdev->dev_addr); | |
1305 | char *firmware_mac = ((char*) &adapter->mac_addr) ; | |
1306 | ||
1307 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1308 | |
1da177e4 | 1309 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
1da177e4 LT |
1310 | seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", |
1311 | current_mac[0], current_mac[1], current_mac[2], | |
1312 | current_mac[3], current_mac[4], current_mac[5]); | |
1313 | seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1314 | firmware_mac[0], firmware_mac[1], firmware_mac[2], | |
1315 | firmware_mac[3], firmware_mac[4], firmware_mac[5]); | |
d7fbeba6 | 1316 | |
1da177e4 LT |
1317 | seq_printf(seq, "\nAdapter Statistics:\n"); |
1318 | seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized); | |
1319 | seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send); | |
1320 | seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed); | |
1321 | seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed); | |
1322 | seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed); | |
1323 | seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles); | |
1324 | seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem); | |
1325 | seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure); | |
1326 | seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer); | |
1327 | seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1328 | |
1da177e4 LT |
1329 | return 0; |
1330 | } | |
1331 | static struct seq_operations ibmveth_seq_ops = { | |
1332 | .start = ibmveth_seq_start, | |
1333 | .next = ibmveth_seq_next, | |
1334 | .stop = ibmveth_seq_stop, | |
1335 | .show = ibmveth_seq_show, | |
1336 | }; | |
1337 | ||
1338 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1339 | { | |
1340 | struct seq_file *seq; | |
1341 | struct proc_dir_entry *proc; | |
1342 | int rc; | |
1343 | ||
1344 | rc = seq_open(file, &ibmveth_seq_ops); | |
1345 | if (!rc) { | |
1346 | /* recover the pointer buried in proc_dir_entry data */ | |
1347 | seq = file->private_data; | |
1348 | proc = PDE(inode); | |
1349 | seq->private = proc->data; | |
1350 | } | |
1351 | return rc; | |
1352 | } | |
1353 | ||
d54b1fdb | 1354 | static const struct file_operations ibmveth_proc_fops = { |
1da177e4 LT |
1355 | .owner = THIS_MODULE, |
1356 | .open = ibmveth_proc_open, | |
1357 | .read = seq_read, | |
1358 | .llseek = seq_lseek, | |
1359 | .release = seq_release, | |
1360 | }; | |
1361 | ||
1362 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1363 | { | |
1364 | struct proc_dir_entry *entry; | |
1365 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1366 | char u_addr[10]; |
1367 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1368 | entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir); | |
1da177e4 LT |
1369 | if (!entry) { |
1370 | ibmveth_error_printk("Cannot create adapter proc entry"); | |
1371 | } else { | |
1372 | entry->data = (void *) adapter; | |
1373 | entry->proc_fops = &ibmveth_proc_fops; | |
1374 | SET_MODULE_OWNER(entry); | |
1375 | } | |
1376 | } | |
1377 | return; | |
1378 | } | |
1379 | ||
1380 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1381 | { | |
1382 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1383 | char u_addr[10]; |
1384 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1385 | remove_proc_entry(u_addr, ibmveth_proc_dir); | |
1da177e4 LT |
1386 | } |
1387 | } | |
1388 | ||
1389 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1390 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1391 | { |
1392 | } | |
1393 | ||
d7fbeba6 | 1394 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1395 | { |
1396 | } | |
1397 | static void ibmveth_proc_register_driver(void) | |
1398 | { | |
1399 | } | |
1400 | ||
1401 | static void ibmveth_proc_unregister_driver(void) | |
1402 | { | |
1403 | } | |
1404 | #endif /* CONFIG_PROC_FS */ | |
1405 | ||
860f242e SL |
1406 | static struct attribute veth_active_attr; |
1407 | static struct attribute veth_num_attr; | |
1408 | static struct attribute veth_size_attr; | |
1409 | ||
1410 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1411 | struct attribute * attr, char * buf) | |
1412 | { | |
d7fbeba6 | 1413 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1414 | struct ibmveth_buff_pool, |
1415 | kobj); | |
1416 | ||
1417 | if (attr == &veth_active_attr) | |
1418 | return sprintf(buf, "%d\n", pool->active); | |
1419 | else if (attr == &veth_num_attr) | |
1420 | return sprintf(buf, "%d\n", pool->size); | |
1421 | else if (attr == &veth_size_attr) | |
1422 | return sprintf(buf, "%d\n", pool->buff_size); | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1427 | const char * buf, size_t count) | |
1428 | { | |
d7fbeba6 | 1429 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1430 | struct ibmveth_buff_pool, |
1431 | kobj); | |
d7fbeba6 | 1432 | struct net_device *netdev = |
860f242e SL |
1433 | container_of(kobj->parent, struct device, kobj)->driver_data; |
1434 | struct ibmveth_adapter *adapter = netdev->priv; | |
1435 | long value = simple_strtol(buf, NULL, 10); | |
1436 | long rc; | |
1437 | ||
1438 | if (attr == &veth_active_attr) { | |
1439 | if (value && !pool->active) { | |
4aa9c93e BK |
1440 | if (netif_running(netdev)) { |
1441 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1442 | ibmveth_error_printk("unable to alloc pool\n"); | |
1443 | return -ENOMEM; | |
1444 | } | |
1445 | pool->active = 1; | |
1446 | adapter->pool_config = 1; | |
1447 | ibmveth_close(netdev); | |
1448 | adapter->pool_config = 0; | |
1449 | if ((rc = ibmveth_open(netdev))) | |
1450 | return rc; | |
1451 | } else | |
1452 | pool->active = 1; | |
860f242e SL |
1453 | } else if (!value && pool->active) { |
1454 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1455 | int i; | |
1456 | /* Make sure there is a buffer pool with buffers that | |
1457 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1458 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1459 | if (pool == &adapter->rx_buff_pool[i]) |
1460 | continue; | |
1461 | if (!adapter->rx_buff_pool[i].active) | |
1462 | continue; | |
76b9cfcc BK |
1463 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1464 | break; | |
860f242e | 1465 | } |
76b9cfcc BK |
1466 | |
1467 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1468 | ibmveth_error_printk("no active pool >= MTU\n"); |
1469 | return -EPERM; | |
1470 | } | |
76b9cfcc BK |
1471 | |
1472 | pool->active = 0; | |
1473 | if (netif_running(netdev)) { | |
1474 | adapter->pool_config = 1; | |
1475 | ibmveth_close(netdev); | |
1476 | adapter->pool_config = 0; | |
1477 | if ((rc = ibmveth_open(netdev))) | |
1478 | return rc; | |
1479 | } | |
860f242e SL |
1480 | } |
1481 | } else if (attr == &veth_num_attr) { | |
1482 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1483 | return -EINVAL; | |
1484 | else { | |
4aa9c93e BK |
1485 | if (netif_running(netdev)) { |
1486 | adapter->pool_config = 1; | |
1487 | ibmveth_close(netdev); | |
1488 | adapter->pool_config = 0; | |
1489 | pool->size = value; | |
1490 | if ((rc = ibmveth_open(netdev))) | |
1491 | return rc; | |
1492 | } else | |
1493 | pool->size = value; | |
860f242e SL |
1494 | } |
1495 | } else if (attr == &veth_size_attr) { | |
1496 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1497 | return -EINVAL; | |
1498 | else { | |
4aa9c93e BK |
1499 | if (netif_running(netdev)) { |
1500 | adapter->pool_config = 1; | |
1501 | ibmveth_close(netdev); | |
1502 | adapter->pool_config = 0; | |
1503 | pool->buff_size = value; | |
1504 | if ((rc = ibmveth_open(netdev))) | |
1505 | return rc; | |
1506 | } else | |
1507 | pool->buff_size = value; | |
860f242e SL |
1508 | } |
1509 | } | |
1510 | ||
1511 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1512 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1513 | return count; |
1514 | } | |
1515 | ||
1516 | ||
1517 | #define ATTR(_name, _mode) \ | |
1518 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1519 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1520 | }; |
1521 | ||
1522 | static ATTR(active, 0644); | |
1523 | static ATTR(num, 0644); | |
1524 | static ATTR(size, 0644); | |
1525 | ||
1526 | static struct attribute * veth_pool_attrs[] = { | |
1527 | &veth_active_attr, | |
1528 | &veth_num_attr, | |
1529 | &veth_size_attr, | |
1530 | NULL, | |
1531 | }; | |
1532 | ||
1533 | static struct sysfs_ops veth_pool_ops = { | |
1534 | .show = veth_pool_show, | |
1535 | .store = veth_pool_store, | |
1536 | }; | |
1537 | ||
1538 | static struct kobj_type ktype_veth_pool = { | |
1539 | .release = NULL, | |
1540 | .sysfs_ops = &veth_pool_ops, | |
1541 | .default_attrs = veth_pool_attrs, | |
1542 | }; | |
1543 | ||
1544 | ||
1da177e4 LT |
1545 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1546 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1547 | { "", "" } |
1da177e4 | 1548 | }; |
1da177e4 LT |
1549 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1550 | ||
1551 | static struct vio_driver ibmveth_driver = { | |
6fdf5392 SR |
1552 | .id_table = ibmveth_device_table, |
1553 | .probe = ibmveth_probe, | |
1554 | .remove = ibmveth_remove, | |
1555 | .driver = { | |
1556 | .name = ibmveth_driver_name, | |
915124d8 | 1557 | .owner = THIS_MODULE, |
6fdf5392 | 1558 | } |
1da177e4 LT |
1559 | }; |
1560 | ||
1561 | static int __init ibmveth_module_init(void) | |
1562 | { | |
1563 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1564 | ||
1565 | ibmveth_proc_register_driver(); | |
1566 | ||
1567 | return vio_register_driver(&ibmveth_driver); | |
1568 | } | |
1569 | ||
1570 | static void __exit ibmveth_module_exit(void) | |
1571 | { | |
1572 | vio_unregister_driver(&ibmveth_driver); | |
1573 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1574 | } |
1da177e4 LT |
1575 | |
1576 | module_init(ibmveth_module_init); | |
1577 | module_exit(ibmveth_module_exit); |